Improvement in metallic packings for piston-rods



T'. TRIPP 8:. P. W. RICHARDS.

METALLIC PACKING FOR rxswon-nonsg N 184,484. Patented Nov. 21, 1876.

UNITED STATES PATENT OFFICE.

THOMAS TRIPP AND PHILLIP W. RICHARDS, OF BOSTON, MASSACHUSETTS; SAIDRICHARDS ASSIGNOR TO SAID TRIPP; SAID TRIPP ASSIGNOR TO WILLIAM H.FLOYD, TRUSTEE OF THE METALLIC STEAM PACKING ASSOCIATION, OF SAME PLACE.

IMPROVEMENT IN METALLIC PACKINGS FOR PISTON-RODS.

Specification forming part of Letters Patent No. 184,484, dated November21, 1876 application filed February 11, 1876.

To all whom it may concern:

Be it known that we, THoMAs TRIPP and PHILLIP W. RICHARDS, both ofBoston, in the county of Suflolk and State of Massachusetts, haveinvented a new and useful Improvement in Metallic Packing for Piston-Rods, of which the following is a specification:

Our invention relates to improvements on that class of packings to whichthe patent granted to P. W. Richards, February 4, 1873, No.l35,589,'belongs; and consists in the construction of the casing-rings,which are made in parts, so as to be easily put onto or taken off fromthe piston-rod; also, in the packingrings themselves, all of which maybe best understood from the following description and drawings.

Figure 1 is an elevation of our invention. Fig. 2 is a plan of the same.Fig. 3 is a horizontal section through the line U V of Fig. 5. Fig. 4 isa horizontal section through the line X Y of Fig. 5. Fig.5 is a verticalsection.

The casing or receptacle in which we place our packing-rings is made oftwo semi-cylindrical pieces,'A and B, Figs. 1, 3, 4, and 5, which aremade fast to each other by means of screws, one of which is shown at M,Fig. This case has an inwardly-projecting flange, T, at its base, asshown in section, Fig. 5.

In some instances we make what we call a double case. Then theinwardly-projecting flange occupies a place at about the middle of theheight of the cylinder, and the packingrings E E H H are placed bothabove and below the flange, and the cylinder has a headring, like C C,at both ends.

The head-ring C 0, Figs. 1, 2, and 5, is

formed as shown in section at Fig. 5, so as to lock onto the undercutannular projection P, the ring C C being made into semi-annular parts,and fastened together by screws L. (See Figs. 1 and 2.)

In the part T, Figs. 3 and 5, We insert a number of springs, S S, uponwhich the ring B, Fig. 5, rests. Upon this ring R we'place one or moresets of packing-rings, E E H H. (See Fig, 4.) These packing-rings areformed of parts which join eachother by inclined joints. to b a b, soarranged that the pressure of the flat springs K K, Figs. 4 and 5, uponthe parts E E, in forcing them toward the piston-rod, will betransmitted by the inclines .a b to the parts H H, and thus force themin onto the piston.

When the rings are properly placed, and the head-ring C C fastened on,the pressure of the spiral springs S S will keep all of the parts inplace and tight together.

Having now described the construction and operation of our invention,what we claim is as follows:

1. The casing A B, united as shown,,and combined with one or morehead-rings, C C, substantially as described, and for the purpose setforth.

2. The combination of the embracing-pieces E and E with the wedge-shapedor inclosed pieces H H, the said pieces E and E forming nearly theentire circle, and provided with springs K and K, all operating togethersubstantially as described, and for the purpose set forth.

THOMAS TRIPP. PHILLIP W. RICHARDS. Witnesses:

WILLIAM EDsoN, N. EVANS, Jr.

